Move deprecated gulp tasks out of gulp

Bower with gulp is deprecated and causing build issues

Signed-off-by: Matt Stratton <matt.stratton@gmail.com>

Author: mattstratton

package.json

@@ -18,7 +18,6 @@
   "devDependencies": {
     "del": "^3.0.0",
     "gulp": "^4.0.0",
-    "gulp-bower": "0.0.14",
     "gulp-cache": "^1.0.0",
     "gulp-concat": "^2.6.1",
     "gulp-htmlmin": "^4.0.0",